Mitsubishi Chemical Corporation

Jgc Corporation

Shinji Iwade

Takayuki Aoshima

Hirofumi Nakamura

Takeshi Okano

Hisao Urata

Yoshitaka Araki

Toshiyuki Oshiki

Yoshiaki Nanba

Eiji Tanaka

Masashi Yamaguchi

Tohru Setoyama

Akio Tsuboi

Yumiko Yoshikawa

Kazunori Honda

Atsushi Okita

Chizu Inaki

Takashi Ishikawa

Jumpei Takahashi

Syunji Katsuki

Riichirou Kawashima

Jun Takahara

Yusuke Kusanagi

A lower olefin producing catalyst which has high olefin production efficiency and maintains its activity for a long period of time when lower olefins are produced from an oxygen-containing compound, which is a solid catalyst used in producing lower olefins from an oxygen-containing compound, includes a solid-state catalyst component containing an MFI-type zeolite, in which, at a position where the shortest distance to the outer surface is maximum among all positions inside a structure of the solid catalyst, the thickness defined as a distance twice the shortest distance from the point to the outer surface is in a range of from 0.1 to 2.0 mm, and a method for producing lower olefins.

Lower olefins producing catalyst and method for producing lower olefins using same

The disclosure described a process for producing an .alpha.-olefin oligomer, which comprises carrying out oligomerization of an .alpha.-olefin in a solvent in the presence of a catalytically effective amount of a chromium-based catalyst system composed of a combination of at least (a) a chromium compound, (b) a nitrogen-containing compound of at least one selected from the group consisting of an amine, an amide and an imide, (c) an alkylaluminum compound and (d) a halogen-containing compound,

Process for producing .alpha.-olefin oligomers

The disclosure describes a process for preparing .alpha.-olefin oligomers, which comprises carrying out oligomerization of an .alpha.-olefin in a solvent by reacting said .alpha.-olefin in a chromium-based catalyst system composed of a combination of at least a chromium compound, an amine or metal amide, and an alkylaluminum compound, in a contacting mode that the chromium compound and the alkylaluminum compound are not previously contacted with each other.

Process for producing .alpha.-olefin oligomers and .alpha.-olefin

An oligomerization of .alpha.-olefins is carried out in a solvent using a chromium-based catalyst system comprising at least (a) a chromium compound, (b) at least one nitrogen-containing compound selected from amines, amides and imides, and (c) an alkylaluminum compound, and the catalyst components and by-product polymers are recovered simultaneously from the reaction solution. Such process is an industrially advantageous process for producing .alpha.-olefin oligomers by using a chromium-based catalyst, and is simple and capable of efficiently recovering the by-product polymers and the catalyst components simultaneously.

Process for the preparation of .alpha.-olefin oligomers

Growing community of inventors

Kurashiki, Japan

Shinji Iwade